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A poll finds that 70% of the people surveyed approve of the President's handling of the economy, with a margin of error (for 95% confidence) of 5%....
A poll finds that 70% of the people surveyed approve of the President's handling of the economy, with a margin of error (for 95% confidence) of 5%. Find the 95% confidence interval for this poll.
Choose the correct answer below.
A.
67.5% to 72.5%, because it ranges 5% and includes the sample proportion in the middle.
B.
67.5% to 72.5%, because the lower range is half of 5% below the sample proportion and the upper range is half of 5% above the sample proportion.
C.
65% to 70%, because the lower range is 5% below the sample proportion and the upper range is the sample proportion.
D.
65% to 75%, because it ranges 10% and includes the sample proportion somewhere within it.
E.
65% to 70%, because it ranges 5% and includes the sample proportion somewhere within it.
F.
65% to 75%, because the lower range is 5% below the sample proportion and the upper range is 5% above the sample proportion.
